The biosignal amplifier includes a preamplifier near the patient. All patient data and the results are stored in a database. The biosignal and averaged curves from all channels can be displayed on the monitor. In the analyze mode the system automatically sets all markers and calculates all the defined parameters.

The RETI-port/scan21 unit from the Roland Consult Stasche & Finger GmbH includes the stimulator units and the data recording and analyzing system.